Create Media / Image-Bundle programmatically (Drupal)

• Step 1: Create a custom module
• Step 2: Controller & routing

Drupal/modules/custom/my_custom_module/src/Controller/MyCustomController2CreateMedia.php :

<?php

namespace Drupal\my_custom_module\Controller;

use Drupal\Core\Controller\ControllerBase;
use Drupal\file\Entity\File;
use Drupal\media\Entity\Media;
use Drupal\Core\File\FileSystemInterface;


/**
 * Class MyCustomController2CreateMedia.
 */
class MyCustomController2CreateMedia extends ControllerBase
{
    public function main()
    {
        $filepath 	=  "/path/to/my-image-123.jpg";
        $filename 	=  'my-image-123.jpg';
        $title 		=  'My Image 123';
        $alt 		= "A black-white picture of the hill";
		
        $copyright = 'Jane Doe';


        $image_data = file_get_contents( $filepath );
        $file_repository = \Drupal::service('file.repository');
        $image = $file_repository->writeData($image_data, "public://".$filename, FileSystemInterface::EXISTS_REPLACE);

        $image_media = Media::create([
            'name' => $filename,
            'bundle' => 'my_image_bundle',
            'uid' => 1,
            'langcode' => 'de',
            'status' => 1,
            'field_image' => [
                'target_id' => $image->id(),
                'alt' => $alt,
                'title' => $title,
            ],
            'field_copyright' => $copyright,
        ]);
        $image_media->save();

    }
}

my_custom_module.routing.yml (in modules/custom/my_custom_module):

my_custom_module.create_media:
  path: '/my_custom_module/create_media'
  defaults:
    _controller: '\Drupal\my_custom_module\Controller\MyCustomController2CreateMedia::main'
    _title: 'My custom module : create media'
  requirements:
    _permission: 'access content'
  options:
    no_cache: 'TRUE'

my_custom_module.info.yml (in modules/custom/my_custom_module):

name: 'My Custom Module'
type: module
description: 'Create media files dynamically' 
core_version_requirement: ">=10"